RAM and Battery Sizes for the New iPhone XS, iPhone XS Max, iPhone XR - iClarified
Apple iPhone Xs Max - Full Specification, price, review
Amazon.com: WAVYPO Battery for iPhone X, 4900mAh Upgraded High Capacity New Version 0 Cycle Battery Replacement for iPhone X Battery A1865, A1901, A1902 and Instruction (No Tools) : Cell Phones & Accessories
Alpatronix BXX 4200mAh Qi Wireless iPhone XS/X Battery Charging Case
iPhone XS, XS Max, XR specs: Battery size, RAM details revealed in new filings | ZDNET
Apple Hub on X: "Full specs including battery capacity and RAM inside the new iPhones have surfaced in regulatory filings. The iPhone XS and XS Max both feature 4GB of RAM, XR
iFixit: iPhone XS Has 'Notched' Battery and iPhone XS Max Has Apple-Designed Power Management Chip [Updated] - MacRumors
iPhone XS Max review: Battery Life and Verdict
The iPhone XS Max has the most RAM and largest battery capacity of any iPhone - SoyaCincau
Apple Filing Confirms iPhone XS Smaller Battery Size
iPhone XS Max Battery Replacement - iFixit Repair Guide
Apple iPhone XS Max review: Lab tests - display, battery life, audio